3: I think the Muslims can, but certainly not all the Franks at once.
4: Mongols can: They'd be stopped somewhere, if only for OTL's reasons, but they could have been larger. But not in south-east Asia.
6: Native American states, is always likeliest most succumb, but certainly a few small states should have been able to survive, especially on land the Europeans didn't want.
7: France could perhaps have kept a few ports.
8: French domination of Europe is unlikely, but not impossible until the invasion of Russia. If Napoleon had died before then...
10: German and Italian states would probably have done some amalgamation, but possibly not as much as OTL.
4: Mongols can: They'd be stopped somewhere, if only for OTL's reasons, but they could have been larger. But not in south-east Asia.
6: Native American states, is always likeliest most succumb, but certainly a few small states should have been able to survive, especially on land the Europeans didn't want.
7: France could perhaps have kept a few ports.
8: French domination of Europe is unlikely, but not impossible until the invasion of Russia. If Napoleon had died before then...
10: German and Italian states would probably have done some amalgamation, but possibly not as much as OTL.